When you refill a LEXMARK 70C0H10 (#700H1), 70C0X10 (#700X1), 70C1XK0 (#701K), 70C1HK0 (#701HK) or 70C1XK0 (#701XK) cartridge, you must replace the chip. This chip is already included with our refill kit. This chip will run for 4000 pages at 5% coverage.